Fix broken links in README

Closes: aptos-labs#7270

README.md

@@ -25,38 +25,22 @@ To begin contributing, [sign the CLA](https://diem.com/en-US/cla-sign/). You can
 
 ### Learn About Diem
 * [Welcome](https://developers.diem.com/docs/welcome-to-diem)
-* [Diem Protocol: Key Concepts](https://developers.diem.com/docs/diem-protocol)
-* [Life of a Transaction](https://developers.diem.com/docs/life-of-a-transaction)
+* [Diem Protocol: Key Concepts](https://developers.diem.com/docs/core/diem-protocol)
+* [Life of a Transaction](https://developers.diem.com/docs/core/life-of-a-transaction)
 * [JSON-RPC SPEC](json-rpc/json-rpc-spec.md)
 
 ### Try Diem Core
-* [My First Transaction](https://developers.diem.com/docs/my-first-transaction)
-* [Getting Started With Move](https://developers.diem.com/docs/move-overview)
+* [My First Transaction](https://developers.diem.com/docs/core/my-first-transaction)
+* [Getting Started With Move](https://developers.diem.com/docs/move/move-introduction)
 
 ### Technical Papers
-* [The Diem Blockchain](https://developers.diem.com/docs/the-diem-blockchain-paper)
-* [Move: A Language With Programmable Resources](https://developers.diem.com/docs/move-paper)
-* [State Machine Replication in the Diem Blockchain](https://developers.diem.com/docs/state-machine-replication-paper)
+* [The Diem Blockchain](https://developers.diem.com/docs/technical-papers/the-diem-blockchain-paper)
+* [Move: A Language With Programmable Resources](https://developers.diem.com/docs/technical-papers/move-paper)
+* [State Machine Replication in the Diem Blockchain](https://developers.diem.com/docs/technical-papers/state-machine-replication-paper)
 
 ### Blog
 * [Diem: The Path Forward](https://developers.diem.com/blog/2019/06/18/the-path-forward/)
 
-### Diem Codebase
-
-* [Diem Core Overview](https://developers.diem.com/docs/diem-core-overview)
-* [Admission Control](https://developers.diem.com/docs/crates/admission-control)
-* [Bytecode Verifier](https://developers.diem.com/docs/crates/bytecode-verifier)
-* [Consensus](https://developers.diem.com/docs/crates/consensus)
-* [Crypto](https://developers.diem.com/docs/crates/crypto)
-* [Execution](https://developers.diem.com/docs/crates/executor)
-* [Mempool](https://developers.diem.com/docs/crates/mempool)
-* [Move IR Compiler](https://developers.diem.com/docs/crates/ir-to-bytecode)
-* [Move Language](https://developers.diem.com/docs/crates/move-language)
-* [Network](https://developers.diem.com/docs/crates/network)
-* [Storage](https://developers.diem.com/docs/crates/storage)
-* [Virtual Machine](https://developers.diem.com/docs/crates/vm)
-
-
 ## Community
 
 * Join us on the [Diem Discourse](https://community.diem.com).